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Title:
HINGE PIN RETAINER
Document Type and Number:
United States Patent 3497906
Inventors:
Mcfadden, Edward J.
Plaque It!
Sponsored by:
Flash of Genius
Publication Date:
03/03/1970
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Assignee:
BYRON JACKSON INC
Primary Class:
16/380
Other Classes:
403/155, 24/265WS
International Classes:
E21B19/06
;
E21B19/00
; E05D5/12; F16C11/00
US Patent References:
0231588
1114239
2195445
Pipe elevator
2449559
2780830
Pin retainer
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